Bee on willow (IMAGE) Ecological Society of America Caption A bee on a willow near Ottawa. Plants in the willow genus support both generalist bee species, as well as pollen specialists. Credit Photo by Jessica Forrest Usage Restrictions Permission required for use License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.